1/* SPDX-License-Identifier: GPL-2.0-only
 2 * Copyright (c) 2013-2019, The Linux Foundation. All rights reserved.
 3 */
 4
 5#ifndef _LINUX_IF_RMNET_H_
 6#define _LINUX_IF_RMNET_H_
 7
 
 
 8struct rmnet_map_header {
 9#if defined(__LITTLE_ENDIAN_BITFIELD)
10	u8  pad_len:6;
11	u8  reserved_bit:1;
12	u8  cd_bit:1;
13#elif defined (__BIG_ENDIAN_BITFIELD)
14	u8  cd_bit:1;
15	u8  reserved_bit:1;
16	u8  pad_len:6;
17#else
18#error	"Please fix <asm/byteorder.h>"
19#endif
20	u8  mux_id;
21	__be16 pkt_len;
22}  __aligned(1);
23
 
 
 
 
 
 
 
 
 
24struct rmnet_map_dl_csum_trailer {
25	u8  reserved1;
26#if defined(__LITTLE_ENDIAN_BITFIELD)
27	u8  valid:1;
28	u8  reserved2:7;
29#elif defined (__BIG_ENDIAN_BITFIELD)
30	u8  reserved2:7;
31	u8  valid:1;
32#else
33#error	"Please fix <asm/byteorder.h>"
34#endif
35	u16 csum_start_offset;
36	u16 csum_length;
37	__be16 csum_value;
38} __aligned(1);
39
 
 
 
 
 
40struct rmnet_map_ul_csum_header {
41	__be16 csum_start_offset;
42#if defined(__LITTLE_ENDIAN_BITFIELD)
43	u16 csum_insert_offset:14;
44	u16 udp_ind:1;
45	u16 csum_enabled:1;
46#elif defined (__BIG_ENDIAN_BITFIELD)
47	u16 csum_enabled:1;
48	u16 udp_ind:1;
49	u16 csum_insert_offset:14;
50#else
51#error	"Please fix <asm/byteorder.h>"
52#endif
53} __aligned(1);
54
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
55#endif /* !(_LINUX_IF_RMNET_H_) */

 1/* SPDX-License-Identifier: GPL-2.0-only
 2 * Copyright (c) 2013-2019, 2021 The Linux Foundation. All rights reserved.
 3 */
 4
 5#ifndef _LINUX_IF_RMNET_H_
 6#define _LINUX_IF_RMNET_H_
 7
 8#include <linux/types.h>
 9
10struct rmnet_map_header {
11	u8 flags;			/* MAP_CMD_FLAG, MAP_PAD_LEN_MASK */
12	u8 mux_id;
13	__be16 pkt_len;			/* Length of packet, including pad */
 
 
 
 
 
 
 
 
 
 
14}  __aligned(1);
15
16/* rmnet_map_header flags field:
17 *  PAD_LEN:	  number of pad bytes following packet data
18 *  CMD:	  1 = packet contains a MAP command; 0 = packet contains data
19 *  NEXT_HEADER: 1 = packet contains V5 CSUM header 0 = no V5 CSUM header
20 */
21#define MAP_PAD_LEN_MASK		GENMASK(5, 0)
22#define MAP_NEXT_HEADER_FLAG		BIT(6)
23#define MAP_CMD_FLAG			BIT(7)
24
25struct rmnet_map_dl_csum_trailer {
26	u8 reserved1;
27	u8 flags;			/* MAP_CSUM_DL_VALID_FLAG */
28	__be16 csum_start_offset;
29	__be16 csum_length;
30	__sum16 csum_value;
 
 
 
 
 
 
 
 
31} __aligned(1);
32
33/* rmnet_map_dl_csum_trailer flags field:
34 *  VALID:	1 = checksum and length valid; 0 = ignore them
35 */
36#define MAP_CSUM_DL_VALID_FLAG		BIT(0)
37
38struct rmnet_map_ul_csum_header {
39	__be16 csum_start_offset;
40	__be16 csum_info;		/* MAP_CSUM_UL_* */
 
 
 
 
 
 
 
 
 
 
41} __aligned(1);
42
43/* csum_info field:
44 *  OFFSET:	where (offset in bytes) to insert computed checksum
45 *  UDP:	1 = UDP checksum (zero checkum means no checksum)
46 *  ENABLED:	1 = checksum computation requested
47 */
48#define MAP_CSUM_UL_OFFSET_MASK		GENMASK(13, 0)
49#define MAP_CSUM_UL_UDP_FLAG		BIT(14)
50#define MAP_CSUM_UL_ENABLED_FLAG	BIT(15)
51
52/* MAP CSUM headers */
53struct rmnet_map_v5_csum_header {
54	u8 header_info;
55	u8 csum_info;
56	__be16 reserved;
57} __aligned(1);
58
59/* v5 header_info field
60 * NEXT_HEADER: represents whether there is any next header
61 * HEADER_TYPE: represents the type of this header
62 *
63 * csum_info field
64 * CSUM_VALID_OR_REQ:
65 * 1 = for UL, checksum computation is requested.
66 * 1 = for DL, validated the checksum and has found it valid
67 */
68
69#define MAPV5_HDRINFO_NXT_HDR_FLAG	BIT(0)
70#define MAPV5_HDRINFO_HDR_TYPE_FMASK	GENMASK(7, 1)
71#define MAPV5_CSUMINFO_VALID_FLAG	BIT(7)
72
73#define RMNET_MAP_HEADER_TYPE_CSUM_OFFLOAD 2
74#endif /* !(_LINUX_IF_RMNET_H_) */